git.oblomov.eu Git - linux-2.6/blob - drivers/net/rrunner.c

   1 /*
   2  * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
   3  *
   4  * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
   5  *
   6  * Thanks to Essential Communication for providing us with hardware
   7  * and very comprehensive documentation without which I would not have
   8  * been able to write this driver. A special thank you to John Gibbon
   9  * for sorting out the legal issues, with the NDA, allowing the code to
  10  * be released under the GPL.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
  18  * stupid bugs in my code.
  19  *
  20  * Softnet support and various other patches from Val Henson of
  21  * ODS/Essential.
  22  *
  23  * PCI DMA mapping code partly based on work by Francois Romieu.
  24  */
  25
  26
  27 #define DEBUG 1
  28 #define RX_DMA_SKBUFF 1
  29 #define PKT_COPY_THRESHOLD 512
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/errno.h>
  34 #include <linux/ioport.h>
  35 #include <linux/pci.h>
  36 #include <linux/kernel.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/hippidevice.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/init.h>
  41 #include <linux/delay.h>
  42 #include <linux/mm.h>
  43 #include <net/sock.h>
  44
  45 #include <asm/system.h>
  46 #include <asm/cache.h>
  47 #include <asm/byteorder.h>
  48 #include <asm/io.h>
  49 #include <asm/irq.h>
  50 #include <asm/uaccess.h>
  51
  52 #define rr_if_busy(dev)     netif_queue_stopped(dev)
  53 #define rr_if_running(dev)  netif_running(dev)
  54
  55 #include "rrunner.h"
  56
  57 #define RUN_AT(x) (jiffies + (x))
  58
  59
  60 MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
  61 MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
  62 MODULE_LICENSE("GPL");
  63
  64 static char version[] __devinitdata = "rrunner.c: v0.50 11/11/2002  Jes Sorensen (jes@wildopensource.com)\n";
  65
  66 /*
  67  * Implementation notes:
  68  *
  69  * The DMA engine only allows for DMA within physical 64KB chunks of
  70  * memory. The current approach of the driver (and stack) is to use
  71  * linear blocks of memory for the skbuffs. However, as the data block
  72  * is always the first part of the skb and skbs are 2^n aligned so we
  73  * are guarantted to get the whole block within one 64KB align 64KB
  74  * chunk.
  75  *
  76  * On the long term, relying on being able to allocate 64KB linear
  77  * chunks of memory is not feasible and the skb handling code and the
  78  * stack will need to know about I/O vectors or something similar.
  79  */
  80
  81 static int __devinit rr_init_one(struct pci_dev *pdev,
  82         const struct pci_device_id *ent)
  83 {
  84         struct net_device *dev;
  85         static int version_disp;
  86         u8 pci_latency;
  87         struct rr_private *rrpriv;
  88         void *tmpptr;
  89         dma_addr_t ring_dma;
  90         int ret = -ENOMEM;
  91
  92         dev = alloc_hippi_dev(sizeof(struct rr_private));
  93         if (!dev)
  94                 goto out3;
  95
  96         ret = pci_enable_device(pdev);
  97         if (ret) {
  98                 ret = -ENODEV;
  99                 goto out2;
 100         }
 101
 102         rrpriv = netdev_priv(dev);
 103
 104         SET_NETDEV_DEV(dev, &pdev->dev);
 105
 106         if (pci_request_regions(pdev, "rrunner")) {
 107                 ret = -EIO;
 108                 goto out;
 109         }
 110
 111         pci_set_drvdata(pdev, dev);
 112
 113         rrpriv->pci_dev = pdev;
 114
 115         spin_lock_init(&rrpriv->lock);
 116
 117         dev->irq = pdev->irq;
 118         dev->open = &rr_open;
 119         dev->hard_start_xmit = &rr_start_xmit;
 120         dev->stop = &rr_close;
 121         dev->do_ioctl = &rr_ioctl;
 122
 123         dev->base_addr = pci_resource_start(pdev, 0);
 124
 125         /* display version info if adapter is found */
 126         if (!version_disp) {
 127                 /* set display flag to TRUE so that */
 128                 /* we only display this string ONCE */
 129                 version_disp = 1;
 130                 printk(version);
 131         }
 132
 133         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 134         if (pci_latency <= 0x58){
 135                 pci_latency = 0x58;
 136                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
 137         }
 138
 139         pci_set_master(pdev);
 140
 141         printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
 142                "at 0x%08lx, irq %i, PCI latency %i\n", dev->name,
 143                dev->base_addr, dev->irq, pci_latency);
 144
 145         /*
 146          * Remap the regs into kernel space.
 147          */
 148
 149         rrpriv->regs = ioremap(dev->base_addr, 0x1000);
 150
 151         if (!rrpriv->regs){
 152                 printk(KERN_ERR "%s:  Unable to map I/O register, "
 153                         "RoadRunner will be disabled.\n", dev->name);
 154                 ret = -EIO;
 155                 goto out;
 156         }
 157
 158         tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
 159         rrpriv->tx_ring = tmpptr;
 160         rrpriv->tx_ring_dma = ring_dma;
 161
 162         if (!tmpptr) {
 163                 ret = -ENOMEM;
 164                 goto out;
 165         }
 166
 167         tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
 168         rrpriv->rx_ring = tmpptr;
 169         rrpriv->rx_ring_dma = ring_dma;
 170
 171         if (!tmpptr) {
 172                 ret = -ENOMEM;
 173                 goto out;
 174         }
 175
 176         tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
 177         rrpriv->evt_ring = tmpptr;
 178         rrpriv->evt_ring_dma = ring_dma;
 179
 180         if (!tmpptr) {
 181                 ret = -ENOMEM;
 182                 goto out;
 183         }
 184
 185         /*
 186          * Don't access any register before this point!
 187          */
 188 #ifdef __BIG_ENDIAN
 189         writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
 190                 &rrpriv->regs->HostCtrl);
 191 #endif
 192         /*
 193          * Need to add a case for little-endian 64-bit hosts here.
 194          */
 195
 196         rr_init(dev);
 197
 198         dev->base_addr = 0;
 199
 200         ret = register_netdev(dev);
 201         if (ret)
 202                 goto out;
 203         return 0;
 204
 205  out:
 206         if (rrpriv->rx_ring)
 207                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
 208                                     rrpriv->rx_ring_dma);
 209         if (rrpriv->tx_ring)
 210                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
 211                                     rrpriv->tx_ring_dma);
 212         if (rrpriv->regs)
 213                 iounmap(rrpriv->regs);
 214         if (pdev) {
 215                 pci_release_regions(pdev);
 216                 pci_set_drvdata(pdev, NULL);
 217         }
 218  out2:
 219         free_netdev(dev);
 220  out3:
 221         return ret;
 222 }
 223
 224 static void __devexit rr_remove_one (struct pci_dev *pdev)
 225 {
 226         struct net_device *dev = pci_get_drvdata(pdev);
 227
 228         if (dev) {
 229                 struct rr_private *rr = netdev_priv(dev);
 230
 231                 if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)){
 232                         printk(KERN_ERR "%s: trying to unload running NIC\n",
 233                                dev->name);
 234                         writel(HALT_NIC, &rr->regs->HostCtrl);
 235                 }
 236
 237                 pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
 238                                     rr->evt_ring_dma);
 239                 pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
 240                                     rr->rx_ring_dma);
 241                 pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
 242                                     rr->tx_ring_dma);
 243                 unregister_netdev(dev);
 244                 iounmap(rr->regs);
 245                 free_netdev(dev);
 246                 pci_release_regions(pdev);
 247                 pci_disable_device(pdev);
 248                 pci_set_drvdata(pdev, NULL);
 249         }
 250 }
 251
 252
 253 /*
 254  * Commands are considered to be slow, thus there is no reason to
 255  * inline this.
 256  */
 257 static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
 258 {
 259         struct rr_regs __iomem *regs;
 260         u32 idx;
 261
 262         regs = rrpriv->regs;
 263         /*
 264          * This is temporary - it will go away in the final version.
 265          * We probably also want to make this function inline.
 266          */
 267         if (readl(&regs->HostCtrl) & NIC_HALTED){
 268                 printk("issuing command for halted NIC, code 0x%x, "
 269                        "HostCtrl %08x\n", cmd->code, readl(&regs->HostCtrl));
 270                 if (readl(&regs->Mode) & FATAL_ERR)
 271                         printk("error codes Fail1 %02x, Fail2 %02x\n",
 272                                readl(&regs->Fail1), readl(&regs->Fail2));
 273         }
 274
 275         idx = rrpriv->info->cmd_ctrl.pi;
 276
 277         writel(*(u32*)(cmd), &regs->CmdRing[idx]);
 278         wmb();
 279
 280         idx = (idx - 1) % CMD_RING_ENTRIES;
 281         rrpriv->info->cmd_ctrl.pi = idx;
 282         wmb();
 283
 284         if (readl(&regs->Mode) & FATAL_ERR)
 285                 printk("error code %02x\n", readl(&regs->Fail1));
 286 }
 287
 288
 289 /*
 290  * Reset the board in a sensible manner. The NIC is already halted
 291  * when we get here and a spin-lock is held.
 292  */
 293 static int rr_reset(struct net_device *dev)
 294 {
 295         struct rr_private *rrpriv;
 296         struct rr_regs __iomem *regs;
 297         u32 start_pc;
 298         int i;
 299
 300         rrpriv = netdev_priv(dev);
 301         regs = rrpriv->regs;
 302
 303         rr_load_firmware(dev);
 304
 305         writel(0x01000000, &regs->TX_state);
 306         writel(0xff800000, &regs->RX_state);
 307         writel(0, &regs->AssistState);
 308         writel(CLEAR_INTA, &regs->LocalCtrl);
 309         writel(0x01, &regs->BrkPt);
 310         writel(0, &regs->Timer);
 311         writel(0, &regs->TimerRef);
 312         writel(RESET_DMA, &regs->DmaReadState);
 313         writel(RESET_DMA, &regs->DmaWriteState);
 314         writel(0, &regs->DmaWriteHostHi);
 315         writel(0, &regs->DmaWriteHostLo);
 316         writel(0, &regs->DmaReadHostHi);
 317         writel(0, &regs->DmaReadHostLo);
 318         writel(0, &regs->DmaReadLen);
 319         writel(0, &regs->DmaWriteLen);
 320         writel(0, &regs->DmaWriteLcl);
 321         writel(0, &regs->DmaWriteIPchecksum);
 322         writel(0, &regs->DmaReadLcl);
 323         writel(0, &regs->DmaReadIPchecksum);
 324         writel(0, &regs->PciState);
 325 #if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
 326         writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, &regs->Mode);
 327 #elif (BITS_PER_LONG == 64)
 328         writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, &regs->Mode);
 329 #else
 330         writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, &regs->Mode);
 331 #endif
 332
 333 #if 0
 334         /*
 335          * Don't worry, this is just black magic.
 336          */
 337         writel(0xdf000, &regs->RxBase);
 338         writel(0xdf000, &regs->RxPrd);
 339         writel(0xdf000, &regs->RxCon);
 340         writel(0xce000, &regs->TxBase);
 341         writel(0xce000, &regs->TxPrd);
 342         writel(0xce000, &regs->TxCon);
 343         writel(0, &regs->RxIndPro);
 344         writel(0, &regs->RxIndCon);
 345         writel(0, &regs->RxIndRef);
 346         writel(0, &regs->TxIndPro);
 347         writel(0, &regs->TxIndCon);
 348         writel(0, &regs->TxIndRef);
 349         writel(0xcc000, &regs->pad10[0]);
 350         writel(0, &regs->DrCmndPro);
 351         writel(0, &regs->DrCmndCon);
 352         writel(0, &regs->DwCmndPro);
 353         writel(0, &regs->DwCmndCon);
 354         writel(0, &regs->DwCmndRef);
 355         writel(0, &regs->DrDataPro);
 356         writel(0, &regs->DrDataCon);
 357         writel(0, &regs->DrDataRef);
 358         writel(0, &regs->DwDataPro);
 359         writel(0, &regs->DwDataCon);
 360         writel(0, &regs->DwDataRef);
 361 #endif
 362
 363         writel(0xffffffff, &regs->MbEvent);
 364         writel(0, &regs->Event);
 365
 366         writel(0, &regs->TxPi);
 367         writel(0, &regs->IpRxPi);
 368
 369         writel(0, &regs->EvtCon);
 370         writel(0, &regs->EvtPrd);
 371
 372         rrpriv->info->evt_ctrl.pi = 0;
 373
 374         for (i = 0; i < CMD_RING_ENTRIES; i++)
 375                 writel(0, &regs->CmdRing[i]);
 376
 377 /*
 378  * Why 32 ? is this not cache line size dependent?
 379  */
 380         writel(RBURST_64|WBURST_64, &regs->PciState);
 381         wmb();
 382
 383         start_pc = rr_read_eeprom_word(rrpriv,
 384                         offsetof(struct eeprom, rncd_info.FwStart));
 385
 386 #if (DEBUG > 1)
 387         printk("%s: Executing firmware at address 0x%06x\n",
 388                dev->name, start_pc);
 389 #endif
 390
 391         writel(start_pc + 0x800, &regs->Pc);
 392         wmb();
 393         udelay(5);
 394
 395         writel(start_pc, &regs->Pc);
 396         wmb();
 397
 398         return 0;
 399 }
 400
 401
 402 /*
 403  * Read a string from the EEPROM.
 404  */
 405 static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
 406                                 unsigned long offset,
 407                                 unsigned char *buf,
 408                                 unsigned long length)
 409 {
 410         struct rr_regs __iomem *regs = rrpriv->regs;
 411         u32 misc, io, host, i;
 412
 413         io = readl(&regs->ExtIo);
 414         writel(0, &regs->ExtIo);
 415         misc = readl(&regs->LocalCtrl);
 416         writel(0, &regs->LocalCtrl);
 417         host = readl(&regs->HostCtrl);
 418         writel(host | HALT_NIC, &regs->HostCtrl);
 419         mb();
 420
 421         for (i = 0; i < length; i++){
 422                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 423                 mb();
 424                 buf[i] = (readl(&regs->WinData) >> 24) & 0xff;
 425                 mb();
 426         }
 427
 428         writel(host, &regs->HostCtrl);
 429         writel(misc, &regs->LocalCtrl);
 430         writel(io, &regs->ExtIo);
 431         mb();
 432         return i;
 433 }
 434
 435
 436 /*
 437  * Shortcut to read one word (4 bytes) out of the EEPROM and convert
 438  * it to our CPU byte-order.
 439  */
 440 static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
 441                             size_t offset)
 442 {
 443         __be32 word;
 444
 445         if ((rr_read_eeprom(rrpriv, offset,
 446                             (unsigned char *)&word, 4) == 4))
 447                 return be32_to_cpu(word);
 448         return 0;
 449 }
 450
 451
 452 /*
 453  * Write a string to the EEPROM.
 454  *
 455  * This is only called when the firmware is not running.
 456  */
 457 static unsigned int write_eeprom(struct rr_private *rrpriv,
 458                                  unsigned long offset,
 459                                  unsigned char *buf,
 460                                  unsigned long length)
 461 {
 462         struct rr_regs __iomem *regs = rrpriv->regs;
 463         u32 misc, io, data, i, j, ready, error = 0;
 464
 465         io = readl(&regs->ExtIo);
 466         writel(0, &regs->ExtIo);
 467         misc = readl(&regs->LocalCtrl);
 468         writel(ENABLE_EEPROM_WRITE, &regs->LocalCtrl);
 469         mb();
 470
 471         for (i = 0; i < length; i++){
 472                 writel((EEPROM_BASE + ((offset+i) << 3)), &regs->WinBase);
 473                 mb();
 474                 data = buf[i] << 24;
 475                 /*
 476                  * Only try to write the data if it is not the same
 477                  * value already.
 478                  */
 479                 if ((readl(&regs->WinData) & 0xff000000) != data){
 480                         writel(data, &regs->WinData);
 481                         ready = 0;
 482                         j = 0;
 483                         mb();
 484                         while(!ready){
 485                                 udelay(20);
 486                                 if ((readl(&regs->WinData) & 0xff000000) ==
 487                                     data)
 488                                         ready = 1;
 489                                 mb();
 490                                 if (j++ > 5000){
 491                                         printk("data mismatch: %08x, "
 492                                                "WinData %08x\n", data,
 493                                                readl(&regs->WinData));
 494                                         ready = 1;
 495                                         error = 1;
 496                                 }
 497                         }
 498                 }
 499         }
 500
 501         writel(misc, &regs->LocalCtrl);
 502         writel(io, &regs->ExtIo);
 503         mb();
 504
 505         return error;
 506 }
 507
 508
 509 static int __devinit rr_init(struct net_device *dev)
 510 {
 511         struct rr_private *rrpriv;
 512         struct rr_regs __iomem *regs;
 513         u32 sram_size, rev;
 514
 515         rrpriv = netdev_priv(dev);
 516         regs = rrpriv->regs;
 517
 518         rev = readl(&regs->FwRev);
 519         rrpriv->fw_rev = rev;
 520         if (rev > 0x00020024)
 521                 printk("  Firmware revision: %i.%i.%i\n", (rev >> 16),
 522                        ((rev >> 8) & 0xff), (rev & 0xff));
 523         else if (rev >= 0x00020000) {
 524                 printk("  Firmware revision: %i.%i.%i (2.0.37 or "
 525                        "later is recommended)\n", (rev >> 16),
 526                        ((rev >> 8) & 0xff), (rev & 0xff));
 527         }else{
 528                 printk("  Firmware revision too old: %i.%i.%i, please "
 529                        "upgrade to 2.0.37 or later.\n",
 530                        (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
 531         }
 532
 533 #if (DEBUG > 2)
 534         printk("  Maximum receive rings %i\n", readl(&regs->MaxRxRng));
 535 #endif
 536
 537         /*
 538          * Read the hardware address from the eeprom.  The HW address
 539          * is not really necessary for HIPPI but awfully convenient.
 540          * The pointer arithmetic to put it in dev_addr is ugly, but
 541          * Donald Becker does it this way for the GigE version of this
 542          * card and it's shorter and more portable than any
 543          * other method I've seen.  -VAL
 544          */
 545
 546         *(__be16 *)(dev->dev_addr) =
 547           htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
 548         *(__be32 *)(dev->dev_addr+2) =
 549           htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
 550
 551         printk("  MAC: %pM\n", dev->dev_addr);
 552
 553         sram_size = rr_read_eeprom_word(rrpriv, 8);
 554         printk("  SRAM size 0x%06x\n", sram_size);
 555
 556         return 0;
 557 }
 558
 559
 560 static int rr_init1(struct net_device *dev)
 561 {
 562         struct rr_private *rrpriv;
 563         struct rr_regs __iomem *regs;
 564         unsigned long myjif, flags;
 565         struct cmd cmd;
 566         u32 hostctrl;
 567         int ecode = 0;
 568         short i;
 569
 570         rrpriv = netdev_priv(dev);
 571         regs = rrpriv->regs;
 572
 573         spin_lock_irqsave(&rrpriv->lock, flags);
 574
 575         hostctrl = readl(&regs->HostCtrl);
 576         writel(hostctrl | HALT_NIC | RR_CLEAR_INT, &regs->HostCtrl);
 577         wmb();
 578
 579         if (hostctrl & PARITY_ERR){
 580                 printk("%s: Parity error halting NIC - this is serious!\n",
 581                        dev->name);
 582                 spin_unlock_irqrestore(&rrpriv->lock, flags);
 583                 ecode = -EFAULT;
 584                 goto error;
 585         }
 586
 587         set_rxaddr(regs, rrpriv->rx_ctrl_dma);
 588         set_infoaddr(regs, rrpriv->info_dma);
 589
 590         rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
 591         rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
 592         rrpriv->info->evt_ctrl.mode = 0;
 593         rrpriv->info->evt_ctrl.pi = 0;
 594         set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
 595
 596         rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
 597         rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
 598         rrpriv->info->cmd_ctrl.mode = 0;
 599         rrpriv->info->cmd_ctrl.pi = 15;
 600
 601         for (i = 0; i < CMD_RING_ENTRIES; i++) {
 602                 writel(0, &regs->CmdRing[i]);
 603         }
 604
 605         for (i = 0; i < TX_RING_ENTRIES; i++) {
 606                 rrpriv->tx_ring[i].size = 0;
 607                 set_rraddr(&rrpriv->tx_ring[i].addr, 0);
 608                 rrpriv->tx_skbuff[i] = NULL;
 609         }
 610         rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
 611         rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
 612         rrpriv->info->tx_ctrl.mode = 0;
 613         rrpriv->info->tx_ctrl.pi = 0;
 614         set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
 615
 616         /*
 617          * Set dirty_tx before we start receiving interrupts, otherwise
 618          * the interrupt handler might think it is supposed to process
 619          * tx ints before we are up and running, which may cause a null
 620          * pointer access in the int handler.
 621          */
 622         rrpriv->tx_full = 0;
 623         rrpriv->cur_rx = 0;
 624         rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
 625
 626         rr_reset(dev);
 627
 628         /* Tuning values */
 629         writel(0x5000, &regs->ConRetry);
 630         writel(0x100, &regs->ConRetryTmr);
 631         writel(0x500000, &regs->ConTmout);
 632         writel(0x60, &regs->IntrTmr);
 633         writel(0x500000, &regs->TxDataMvTimeout);
 634         writel(0x200000, &regs->RxDataMvTimeout);
 635         writel(0x80, &regs->WriteDmaThresh);
 636         writel(0x80, &regs->ReadDmaThresh);
 637
 638         rrpriv->fw_running = 0;
 639         wmb();
 640
 641         hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
 642         writel(hostctrl, &regs->HostCtrl);
 643         wmb();
 644
 645         spin_unlock_irqrestore(&rrpriv->lock, flags);
 646
 647         for (i = 0; i < RX_RING_ENTRIES; i++) {
 648                 struct sk_buff *skb;
 649                 dma_addr_t addr;
 650
 651                 rrpriv->rx_ring[i].mode = 0;
 652                 skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
 653                 if (!skb) {
 654                         printk(KERN_WARNING "%s: Unable to allocate memory "
 655                                "for receive ring - halting NIC\n", dev->name);
 656                         ecode = -ENOMEM;
 657                         goto error;
 658                 }
 659                 rrpriv->rx_skbuff[i] = skb;
 660                 addr = pci_map_single(rrpriv->pci_dev, skb->data,
 661                         dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 662                 /*
 663                  * Sanity test to see if we conflict with the DMA
 664                  * limitations of the Roadrunner.
 665                  */
 666                 if ((((unsigned long)skb->data) & 0xfff) > ~65320)
 667                         printk("skb alloc error\n");
 668
 669                 set_rraddr(&rrpriv->rx_ring[i].addr, addr);
 670                 rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
 671         }
 672
 673         rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
 674         rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
 675         rrpriv->rx_ctrl[4].mode = 8;
 676         rrpriv->rx_ctrl[4].pi = 0;
 677         wmb();
 678         set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
 679
 680         udelay(1000);
 681
 682         /*
 683          * Now start the FirmWare.
 684          */
 685         cmd.code = C_START_FW;
 686         cmd.ring = 0;
 687         cmd.index = 0;
 688
 689         rr_issue_cmd(rrpriv, &cmd);
 690
 691         /*
 692          * Give the FirmWare time to chew on the `get running' command.
 693          */
 694         myjif = jiffies + 5 * HZ;
 695         while (time_before(jiffies, myjif) && !rrpriv->fw_running)
 696                 cpu_relax();
 697
 698         netif_start_queue(dev);
 699
 700         return ecode;
 701
 702  error:
 703         /*
 704          * We might have gotten here because we are out of memory,
 705          * make sure we release everything we allocated before failing
 706          */
 707         for (i = 0; i < RX_RING_ENTRIES; i++) {
 708                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
 709
 710                 if (skb) {
 711                         pci_unmap_single(rrpriv->pci_dev,
 712                                          rrpriv->rx_ring[i].addr.addrlo,
 713                                          dev->mtu + HIPPI_HLEN,
 714                                          PCI_DMA_FROMDEVICE);
 715                         rrpriv->rx_ring[i].size = 0;
 716                         set_rraddr(&rrpriv->rx_ring[i].addr, 0);
 717                         dev_kfree_skb(skb);
 718                         rrpriv->rx_skbuff[i] = NULL;
 719                 }
 720         }
 721         return ecode;
 722 }
 723
 724
 725 /*
 726  * All events are considered to be slow (RX/TX ints do not generate
 727  * events) and are handled here, outside the main interrupt handler,
 728  * to reduce the size of the handler.
 729  */
 730 static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
 731 {
 732         struct rr_private *rrpriv;
 733         struct rr_regs __iomem *regs;
 734         u32 tmp;
 735
 736         rrpriv = netdev_priv(dev);
 737         regs = rrpriv->regs;
 738
 739         while (prodidx != eidx){
 740                 switch (rrpriv->evt_ring[eidx].code){
 741                 case E_NIC_UP:
 742                         tmp = readl(&regs->FwRev);
 743                         printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
 744                                "up and running\n", dev->name,
 745                                (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
 746                         rrpriv->fw_running = 1;
 747                         writel(RX_RING_ENTRIES - 1, &regs->IpRxPi);
 748                         wmb();
 749                         break;
 750                 case E_LINK_ON:
 751                         printk(KERN_INFO "%s: Optical link ON\n", dev->name);
 752                         break;
 753                 case E_LINK_OFF:
 754                         printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
 755                         break;
 756                 case E_RX_IDLE:
 757                         printk(KERN_WARNING "%s: RX data not moving\n",
 758                                dev->name);
 759                         goto drop;
 760                 case E_WATCHDOG:
 761                         printk(KERN_INFO "%s: The watchdog is here to see "
 762                                "us\n", dev->name);
 763                         break;
 764                 case E_INTERN_ERR:
 765                         printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
 766                                dev->name);
 767                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 768                                &regs->HostCtrl);
 769                         wmb();
 770                         break;
 771                 case E_HOST_ERR:
 772                         printk(KERN_ERR "%s: Host software error\n",
 773                                dev->name);
 774                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 775                                &regs->HostCtrl);
 776                         wmb();
 777                         break;
 778                 /*
 779                  * TX events.
 780                  */
 781                 case E_CON_REJ:
 782                         printk(KERN_WARNING "%s: Connection rejected\n",
 783                                dev->name);
 784                         dev->stats.tx_aborted_errors++;
 785                         break;
 786                 case E_CON_TMOUT:
 787                         printk(KERN_WARNING "%s: Connection timeout\n",
 788                                dev->name);
 789                         break;
 790                 case E_DISC_ERR:
 791                         printk(KERN_WARNING "%s: HIPPI disconnect error\n",
 792                                dev->name);
 793                         dev->stats.tx_aborted_errors++;
 794                         break;
 795                 case E_INT_PRTY:
 796                         printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
 797                                dev->name);
 798                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 799                                &regs->HostCtrl);
 800                         wmb();
 801                         break;
 802                 case E_TX_IDLE:
 803                         printk(KERN_WARNING "%s: Transmitter idle\n",
 804                                dev->name);
 805                         break;
 806                 case E_TX_LINK_DROP:
 807                         printk(KERN_WARNING "%s: Link lost during transmit\n",
 808                                dev->name);
 809                         dev->stats.tx_aborted_errors++;
 810                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 811                                &regs->HostCtrl);
 812                         wmb();
 813                         break;
 814                 case E_TX_INV_RNG:
 815                         printk(KERN_ERR "%s: Invalid send ring block\n",
 816                                dev->name);
 817                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 818                                &regs->HostCtrl);
 819                         wmb();
 820                         break;
 821                 case E_TX_INV_BUF:
 822                         printk(KERN_ERR "%s: Invalid send buffer address\n",
 823                                dev->name);
 824                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 825                                &regs->HostCtrl);
 826                         wmb();
 827                         break;
 828                 case E_TX_INV_DSC:
 829                         printk(KERN_ERR "%s: Invalid descriptor address\n",
 830                                dev->name);
 831                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 832                                &regs->HostCtrl);
 833                         wmb();
 834                         break;
 835                 /*
 836                  * RX events.
 837                  */
 838                 case E_RX_RNG_OUT:
 839                         printk(KERN_INFO "%s: Receive ring full\n", dev->name);
 840                         break;
 841
 842                 case E_RX_PAR_ERR:
 843                         printk(KERN_WARNING "%s: Receive parity error\n",
 844                                dev->name);
 845                         goto drop;
 846                 case E_RX_LLRC_ERR:
 847                         printk(KERN_WARNING "%s: Receive LLRC error\n",
 848                                dev->name);
 849                         goto drop;
 850                 case E_PKT_LN_ERR:
 851                         printk(KERN_WARNING "%s: Receive packet length "
 852                                "error\n", dev->name);
 853                         goto drop;
 854                 case E_DTA_CKSM_ERR:
 855                         printk(KERN_WARNING "%s: Data checksum error\n",
 856                                dev->name);
 857                         goto drop;
 858                 case E_SHT_BST:
 859                         printk(KERN_WARNING "%s: Unexpected short burst "
 860                                "error\n", dev->name);
 861                         goto drop;
 862                 case E_STATE_ERR:
 863                         printk(KERN_WARNING "%s: Recv. state transition"
 864                                " error\n", dev->name);
 865                         goto drop;
 866                 case E_UNEXP_DATA:
 867                         printk(KERN_WARNING "%s: Unexpected data error\n",
 868                                dev->name);
 869                         goto drop;
 870                 case E_LST_LNK_ERR:
 871                         printk(KERN_WARNING "%s: Link lost error\n",
 872                                dev->name);
 873                         goto drop;
 874                 case E_FRM_ERR:
 875                         printk(KERN_WARNING "%s: Framming Error\n",
 876                                dev->name);
 877                         goto drop;
 878                 case E_FLG_SYN_ERR:
 879                         printk(KERN_WARNING "%s: Flag sync. lost during "
 880                                "packet\n", dev->name);
 881                         goto drop;
 882                 case E_RX_INV_BUF:
 883                         printk(KERN_ERR "%s: Invalid receive buffer "
 884                                "address\n", dev->name);
 885                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 886                                &regs->HostCtrl);
 887                         wmb();
 888                         break;
 889                 case E_RX_INV_DSC:
 890                         printk(KERN_ERR "%s: Invalid receive descriptor "
 891                                "address\n", dev->name);
 892                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 893                                &regs->HostCtrl);
 894                         wmb();
 895                         break;
 896                 case E_RNG_BLK:
 897                         printk(KERN_ERR "%s: Invalid ring block\n",
 898                                dev->name);
 899                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
 900                                &regs->HostCtrl);
 901                         wmb();
 902                         break;
 903                 drop:
 904                         /* Label packet to be dropped.
 905                          * Actual dropping occurs in rx
 906                          * handling.
 907                          *
 908                          * The index of packet we get to drop is
 909                          * the index of the packet following
 910                          * the bad packet. -kbf
 911                          */
 912                         {
 913                                 u16 index = rrpriv->evt_ring[eidx].index;
 914                                 index = (index + (RX_RING_ENTRIES - 1)) %
 915                                         RX_RING_ENTRIES;
 916                                 rrpriv->rx_ring[index].mode |=
 917                                         (PACKET_BAD | PACKET_END);
 918                         }
 919                         break;
 920                 default:
 921                         printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
 922                                dev->name, rrpriv->evt_ring[eidx].code);
 923                 }
 924                 eidx = (eidx + 1) % EVT_RING_ENTRIES;
 925         }
 926
 927         rrpriv->info->evt_ctrl.pi = eidx;
 928         wmb();
 929         return eidx;
 930 }
 931
 932
 933 static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
 934 {
 935         struct rr_private *rrpriv = netdev_priv(dev);
 936         struct rr_regs __iomem *regs = rrpriv->regs;
 937
 938         do {
 939                 struct rx_desc *desc;
 940                 u32 pkt_len;
 941
 942                 desc = &(rrpriv->rx_ring[index]);
 943                 pkt_len = desc->size;
 944 #if (DEBUG > 2)
 945                 printk("index %i, rxlimit %i\n", index, rxlimit);
 946                 printk("len %x, mode %x\n", pkt_len, desc->mode);
 947 #endif
 948                 if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
 949                         dev->stats.rx_dropped++;
 950                         goto defer;
 951                 }
 952
 953                 if (pkt_len > 0){
 954                         struct sk_buff *skb, *rx_skb;
 955
 956                         rx_skb = rrpriv->rx_skbuff[index];
 957
 958                         if (pkt_len < PKT_COPY_THRESHOLD) {
 959                                 skb = alloc_skb(pkt_len, GFP_ATOMIC);
 960                                 if (skb == NULL){
 961                                         printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
 962                                         dev->stats.rx_dropped++;
 963                                         goto defer;
 964                                 } else {
 965                                         pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
 966                                                                     desc->addr.addrlo,
 967                                                                     pkt_len,
 968                                                                     PCI_DMA_FROMDEVICE);
 969
 970                                         memcpy(skb_put(skb, pkt_len),
 971                                                rx_skb->data, pkt_len);
 972
 973                                         pci_dma_sync_single_for_device(rrpriv->pci_dev,
 974                                                                        desc->addr.addrlo,
 975                                                                        pkt_len,
 976                                                                        PCI_DMA_FROMDEVICE);
 977                                 }
 978                         }else{
 979                                 struct sk_buff *newskb;
 980
 981                                 newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
 982                                         GFP_ATOMIC);
 983                                 if (newskb){
 984                                         dma_addr_t addr;
 985
 986                                         pci_unmap_single(rrpriv->pci_dev,
 987                                                 desc->addr.addrlo, dev->mtu +
 988                                                 HIPPI_HLEN, PCI_DMA_FROMDEVICE);
 989                                         skb = rx_skb;
 990                                         skb_put(skb, pkt_len);
 991                                         rrpriv->rx_skbuff[index] = newskb;
 992                                         addr = pci_map_single(rrpriv->pci_dev,
 993                                                 newskb->data,
 994                                                 dev->mtu + HIPPI_HLEN,
 995                                                 PCI_DMA_FROMDEVICE);
 996                                         set_rraddr(&desc->addr, addr);
 997                                 } else {
 998                                         printk("%s: Out of memory, deferring "
 999                                                "packet\n", dev->name);
1000                                         dev->stats.rx_dropped++;
1001                                         goto defer;
1002                                 }
1003                         }
1004                         skb->protocol = hippi_type_trans(skb, dev);
1005
1006                         netif_rx(skb);          /* send it up */
1007
1008                         dev->last_rx = jiffies;
1009                         dev->stats.rx_packets++;
1010                         dev->stats.rx_bytes += pkt_len;
1011                 }
1012         defer:
1013                 desc->mode = 0;
1014                 desc->size = dev->mtu + HIPPI_HLEN;
1015
1016                 if ((index & 7) == 7)
1017                         writel(index, &regs->IpRxPi);
1018
1019                 index = (index + 1) % RX_RING_ENTRIES;
1020         } while(index != rxlimit);
1021
1022         rrpriv->cur_rx = index;
1023         wmb();
1024 }
1025
1026
1027 static irqreturn_t rr_interrupt(int irq, void *dev_id)
1028 {
1029         struct rr_private *rrpriv;
1030         struct rr_regs __iomem *regs;
1031         struct net_device *dev = (struct net_device *)dev_id;
1032         u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
1033
1034         rrpriv = netdev_priv(dev);
1035         regs = rrpriv->regs;
1036
1037         if (!(readl(&regs->HostCtrl) & RR_INT))
1038                 return IRQ_NONE;
1039
1040         spin_lock(&rrpriv->lock);
1041
1042         prodidx = readl(&regs->EvtPrd);
1043         txcsmr = (prodidx >> 8) & 0xff;
1044         rxlimit = (prodidx >> 16) & 0xff;
1045         prodidx &= 0xff;
1046
1047 #if (DEBUG > 2)
1048         printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
1049                prodidx, rrpriv->info->evt_ctrl.pi);
1050 #endif
1051         /*
1052          * Order here is important.  We must handle events
1053          * before doing anything else in order to catch
1054          * such things as LLRC errors, etc -kbf
1055          */
1056
1057         eidx = rrpriv->info->evt_ctrl.pi;
1058         if (prodidx != eidx)
1059                 eidx = rr_handle_event(dev, prodidx, eidx);
1060
1061         rxindex = rrpriv->cur_rx;
1062         if (rxindex != rxlimit)
1063                 rx_int(dev, rxlimit, rxindex);
1064
1065         txcon = rrpriv->dirty_tx;
1066         if (txcsmr != txcon) {
1067                 do {
1068                         /* Due to occational firmware TX producer/consumer out
1069                          * of sync. error need to check entry in ring -kbf
1070                          */
1071                         if(rrpriv->tx_skbuff[txcon]){
1072                                 struct tx_desc *desc;
1073                                 struct sk_buff *skb;
1074
1075                                 desc = &(rrpriv->tx_ring[txcon]);
1076                                 skb = rrpriv->tx_skbuff[txcon];
1077
1078                                 dev->stats.tx_packets++;
1079                                 dev->stats.tx_bytes += skb->len;
1080
1081                                 pci_unmap_single(rrpriv->pci_dev,
1082                                                  desc->addr.addrlo, skb->len,
1083                                                  PCI_DMA_TODEVICE);
1084                                 dev_kfree_skb_irq(skb);
1085
1086                                 rrpriv->tx_skbuff[txcon] = NULL;
1087                                 desc->size = 0;
1088                                 set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
1089                                 desc->mode = 0;
1090                         }
1091                         txcon = (txcon + 1) % TX_RING_ENTRIES;
1092                 } while (txcsmr != txcon);
1093                 wmb();
1094
1095                 rrpriv->dirty_tx = txcon;
1096                 if (rrpriv->tx_full && rr_if_busy(dev) &&
1097                     (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
1098                      != rrpriv->dirty_tx)){
1099                         rrpriv->tx_full = 0;
1100                         netif_wake_queue(dev);
1101                 }
1102         }
1103
1104         eidx |= ((txcsmr << 8) | (rxlimit << 16));
1105         writel(eidx, &regs->EvtCon);
1106         wmb();
1107
1108         spin_unlock(&rrpriv->lock);
1109         return IRQ_HANDLED;
1110 }
1111
1112 static inline void rr_raz_tx(struct rr_private *rrpriv,
1113                              struct net_device *dev)
1114 {
1115         int i;
1116
1117         for (i = 0; i < TX_RING_ENTRIES; i++) {
1118                 struct sk_buff *skb = rrpriv->tx_skbuff[i];
1119
1120                 if (skb) {
1121                         struct tx_desc *desc = &(rrpriv->tx_ring[i]);
1122
1123                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1124                                 skb->len, PCI_DMA_TODEVICE);
1125                         desc->size = 0;
1126                         set_rraddr(&desc->addr, 0);
1127                         dev_kfree_skb(skb);
1128                         rrpriv->tx_skbuff[i] = NULL;
1129                 }
1130         }
1131 }
1132
1133
1134 static inline void rr_raz_rx(struct rr_private *rrpriv,
1135                              struct net_device *dev)
1136 {
1137         int i;
1138
1139         for (i = 0; i < RX_RING_ENTRIES; i++) {
1140                 struct sk_buff *skb = rrpriv->rx_skbuff[i];
1141
1142                 if (skb) {
1143                         struct rx_desc *desc = &(rrpriv->rx_ring[i]);
1144
1145                         pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
1146                                 dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
1147                         desc->size = 0;
1148                         set_rraddr(&desc->addr, 0);
1149                         dev_kfree_skb(skb);
1150                         rrpriv->rx_skbuff[i] = NULL;
1151                 }
1152         }
1153 }
1154
1155 static void rr_timer(unsigned long data)
1156 {
1157         struct net_device *dev = (struct net_device *)data;
1158         struct rr_private *rrpriv = netdev_priv(dev);
1159         struct rr_regs __iomem *regs = rrpriv->regs;
1160         unsigned long flags;
1161
1162         if (readl(&regs->HostCtrl) & NIC_HALTED){
1163                 printk("%s: Restarting nic\n", dev->name);
1164                 memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
1165                 memset(rrpriv->info, 0, sizeof(struct rr_info));
1166                 wmb();
1167
1168                 rr_raz_tx(rrpriv, dev);
1169                 rr_raz_rx(rrpriv, dev);
1170
1171                 if (rr_init1(dev)) {
1172                         spin_lock_irqsave(&rrpriv->lock, flags);
1173                         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
1174                                &regs->HostCtrl);
1175                         spin_unlock_irqrestore(&rrpriv->lock, flags);
1176                 }
1177         }
1178         rrpriv->timer.expires = RUN_AT(5*HZ);
1179         add_timer(&rrpriv->timer);
1180 }
1181
1182
1183 static int rr_open(struct net_device *dev)
1184 {
1185         struct rr_private *rrpriv = netdev_priv(dev);
1186         struct pci_dev *pdev = rrpriv->pci_dev;
1187         struct rr_regs __iomem *regs;
1188         int ecode = 0;
1189         unsigned long flags;
1190         dma_addr_t dma_addr;
1191
1192         regs = rrpriv->regs;
1193
1194         if (rrpriv->fw_rev < 0x00020000) {
1195                 printk(KERN_WARNING "%s: trying to configure device with "
1196                        "obsolete firmware\n", dev->name);
1197                 ecode = -EBUSY;
1198                 goto error;
1199         }
1200
1201         rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
1202                                                256 * sizeof(struct ring_ctrl),
1203                                                &dma_addr);
1204         if (!rrpriv->rx_ctrl) {
1205                 ecode = -ENOMEM;
1206                 goto error;
1207         }
1208         rrpriv->rx_ctrl_dma = dma_addr;
1209         memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
1210
1211         rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
1212                                             &dma_addr);
1213         if (!rrpriv->info) {
1214                 ecode = -ENOMEM;
1215                 goto error;
1216         }
1217         rrpriv->info_dma = dma_addr;
1218         memset(rrpriv->info, 0, sizeof(struct rr_info));
1219         wmb();
1220
1221         spin_lock_irqsave(&rrpriv->lock, flags);
1222         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1223         readl(&regs->HostCtrl);
1224         spin_unlock_irqrestore(&rrpriv->lock, flags);
1225
1226         if (request_irq(dev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
1227                 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1228                        dev->name, dev->irq);
1229                 ecode = -EAGAIN;
1230                 goto error;
1231         }
1232
1233         if ((ecode = rr_init1(dev)))
1234                 goto error;
1235
1236         /* Set the timer to switch to check for link beat and perhaps switch
1237            to an alternate media type. */
1238         init_timer(&rrpriv->timer);
1239         rrpriv->timer.expires = RUN_AT(5*HZ);           /* 5 sec. watchdog */
1240         rrpriv->timer.data = (unsigned long)dev;
1241         rrpriv->timer.function = &rr_timer;               /* timer handler */
1242         add_timer(&rrpriv->timer);
1243
1244         netif_start_queue(dev);
1245
1246         return ecode;
1247
1248  error:
1249         spin_lock_irqsave(&rrpriv->lock, flags);
1250         writel(readl(&regs->HostCtrl)|HALT_NIC|RR_CLEAR_INT, &regs->HostCtrl);
1251         spin_unlock_irqrestore(&rrpriv->lock, flags);
1252
1253         if (rrpriv->info) {
1254                 pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
1255                                     rrpriv->info_dma);
1256                 rrpriv->info = NULL;
1257         }
1258         if (rrpriv->rx_ctrl) {
1259                 pci_free_consistent(pdev, sizeof(struct ring_ctrl),
1260                                     rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1261                 rrpriv->rx_ctrl = NULL;
1262         }
1263
1264         netif_stop_queue(dev);
1265
1266         return ecode;
1267 }
1268
1269
1270 static void rr_dump(struct net_device *dev)
1271 {
1272         struct rr_private *rrpriv;
1273         struct rr_regs __iomem *regs;
1274         u32 index, cons;
1275         short i;
1276         int len;
1277
1278         rrpriv = netdev_priv(dev);
1279         regs = rrpriv->regs;
1280
1281         printk("%s: dumping NIC TX rings\n", dev->name);
1282
1283         printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
1284                readl(&regs->RxPrd), readl(&regs->TxPrd),
1285                readl(&regs->EvtPrd), readl(&regs->TxPi),
1286                rrpriv->info->tx_ctrl.pi);
1287
1288         printk("Error code 0x%x\n", readl(&regs->Fail1));
1289
1290         index = (((readl(&regs->EvtPrd) >> 8) & 0xff ) - 1) % EVT_RING_ENTRIES;
1291         cons = rrpriv->dirty_tx;
1292         printk("TX ring index %i, TX consumer %i\n",
1293                index, cons);
1294
1295         if (rrpriv->tx_skbuff[index]){
1296                 len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
1297                 printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
1298                 for (i = 0; i < len; i++){
1299                         if (!(i & 7))
1300                                 printk("\n");
1301                         printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
1302                 }
1303                 printk("\n");
1304         }
1305
1306         if (rrpriv->tx_skbuff[cons]){
1307                 len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
1308                 printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
1309                 printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
1310                        rrpriv->tx_ring[cons].mode,
1311                        rrpriv->tx_ring[cons].size,
1312                        (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
1313                        (unsigned long)rrpriv->tx_skbuff[cons]->data,
1314                        (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
1315                 for (i = 0; i < len; i++){
1316                         if (!(i & 7))
1317                                 printk("\n");
1318                         printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
1319                 }
1320                 printk("\n");
1321         }
1322
1323         printk("dumping TX ring info:\n");
1324         for (i = 0; i < TX_RING_ENTRIES; i++)
1325                 printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
1326                        rrpriv->tx_ring[i].mode,
1327                        rrpriv->tx_ring[i].size,
1328                        (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
1329
1330 }
1331
1332
1333 static int rr_close(struct net_device *dev)
1334 {
1335         struct rr_private *rrpriv;
1336         struct rr_regs __iomem *regs;
1337         unsigned long flags;
1338         u32 tmp;
1339         short i;
1340
1341         netif_stop_queue(dev);
1342
1343         rrpriv = netdev_priv(dev);
1344         regs = rrpriv->regs;
1345
1346         /*
1347          * Lock to make sure we are not cleaning up while another CPU
1348          * is handling interrupts.
1349          */
1350         spin_lock_irqsave(&rrpriv->lock, flags);
1351
1352         tmp = readl(&regs->HostCtrl);
1353         if (tmp & NIC_HALTED){
1354                 printk("%s: NIC already halted\n", dev->name);
1355                 rr_dump(dev);
1356         }else{
1357                 tmp |= HALT_NIC | RR_CLEAR_INT;
1358                 writel(tmp, &regs->HostCtrl);
1359                 readl(&regs->HostCtrl);
1360         }
1361
1362         rrpriv->fw_running = 0;
1363
1364         del_timer_sync(&rrpriv->timer);
1365
1366         writel(0, &regs->TxPi);
1367         writel(0, &regs->IpRxPi);
1368
1369         writel(0, &regs->EvtCon);
1370         writel(0, &regs->EvtPrd);
1371
1372         for (i = 0; i < CMD_RING_ENTRIES; i++)
1373                 writel(0, &regs->CmdRing[i]);
1374
1375         rrpriv->info->tx_ctrl.entries = 0;
1376         rrpriv->info->cmd_ctrl.pi = 0;
1377         rrpriv->info->evt_ctrl.pi = 0;
1378         rrpriv->rx_ctrl[4].entries = 0;
1379
1380         rr_raz_tx(rrpriv, dev);
1381         rr_raz_rx(rrpriv, dev);
1382
1383         pci_free_consistent(rrpriv->pci_dev, 256 * sizeof(struct ring_ctrl),
1384                             rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
1385         rrpriv->rx_ctrl = NULL;
1386
1387         pci_free_consistent(rrpriv->pci_dev, sizeof(struct rr_info),
1388                             rrpriv->info, rrpriv->info_dma);
1389         rrpriv->info = NULL;
1390
1391         free_irq(dev->irq, dev);
1392         spin_unlock_irqrestore(&rrpriv->lock, flags);
1393
1394         return 0;
1395 }
1396
1397
1398 static int rr_start_xmit(struct sk_buff *skb, struct net_device *dev)
1399 {
1400         struct rr_private *rrpriv = netdev_priv(dev);
1401         struct rr_regs __iomem *regs = rrpriv->regs;
1402         struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
1403         struct ring_ctrl *txctrl;
1404         unsigned long flags;
1405         u32 index, len = skb->len;
1406         u32 *ifield;
1407         struct sk_buff *new_skb;
1408
1409         if (readl(&regs->Mode) & FATAL_ERR)
1410                 printk("error codes Fail1 %02x, Fail2 %02x\n",
1411                        readl(&regs->Fail1), readl(&regs->Fail2));
1412
1413         /*
1414          * We probably need to deal with tbusy here to prevent overruns.
1415          */
1416
1417         if (skb_headroom(skb) < 8){
1418                 printk("incoming skb too small - reallocating\n");
1419                 if (!(new_skb = dev_alloc_skb(len + 8))) {
1420                         dev_kfree_skb(skb);
1421                         netif_wake_queue(dev);
1422                         return -EBUSY;
1423                 }
1424                 skb_reserve(new_skb, 8);
1425                 skb_put(new_skb, len);
1426                 skb_copy_from_linear_data(skb, new_skb->data, len);
1427                 dev_kfree_skb(skb);
1428                 skb = new_skb;
1429         }
1430
1431         ifield = (u32 *)skb_push(skb, 8);
1432
1433         ifield[0] = 0;
1434         ifield[1] = hcb->ifield;
1435
1436         /*
1437          * We don't need the lock before we are actually going to start
1438          * fiddling with the control blocks.
1439          */
1440         spin_lock_irqsave(&rrpriv->lock, flags);
1441
1442         txctrl = &rrpriv->info->tx_ctrl;
1443
1444         index = txctrl->pi;
1445
1446         rrpriv->tx_skbuff[index] = skb;
1447         set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
1448                 rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
1449         rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
1450         rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
1451         txctrl->pi = (index + 1) % TX_RING_ENTRIES;
1452         wmb();
1453         writel(txctrl->pi, &regs->TxPi);
1454
1455         if (txctrl->pi == rrpriv->dirty_tx){
1456                 rrpriv->tx_full = 1;
1457                 netif_stop_queue(dev);
1458         }
1459
1460         spin_unlock_irqrestore(&rrpriv->lock, flags);
1461
1462         dev->trans_start = jiffies;
1463         return 0;
1464 }
1465
1466
1467 /*
1468  * Read the firmware out of the EEPROM and put it into the SRAM
1469  * (or from user space - later)
1470  *
1471  * This operation requires the NIC to be halted and is performed with
1472  * interrupts disabled and with the spinlock hold.
1473  */
1474 static int rr_load_firmware(struct net_device *dev)
1475 {
1476         struct rr_private *rrpriv;
1477         struct rr_regs __iomem *regs;
1478         size_t eptr, segptr;
1479         int i, j;
1480         u32 localctrl, sptr, len, tmp;
1481         u32 p2len, p2size, nr_seg, revision, io, sram_size;
1482
1483         rrpriv = netdev_priv(dev);
1484         regs = rrpriv->regs;
1485
1486         if (dev->flags & IFF_UP)
1487                 return -EBUSY;
1488
1489         if (!(readl(&regs->HostCtrl) & NIC_HALTED)){
1490                 printk("%s: Trying to load firmware to a running NIC.\n",
1491                        dev->name);
1492                 return -EBUSY;
1493         }
1494
1495         localctrl = readl(&regs->LocalCtrl);
1496         writel(0, &regs->LocalCtrl);
1497
1498         writel(0, &regs->EvtPrd);
1499         writel(0, &regs->RxPrd);
1500         writel(0, &regs->TxPrd);
1501
1502         /*
1503          * First wipe the entire SRAM, otherwise we might run into all
1504          * kinds of trouble ... sigh, this took almost all afternoon
1505          * to track down ;-(
1506          */
1507         io = readl(&regs->ExtIo);
1508         writel(0, &regs->ExtIo);
1509         sram_size = rr_read_eeprom_word(rrpriv, 8);
1510
1511         for (i = 200; i < sram_size / 4; i++){
1512                 writel(i * 4, &regs->WinBase);
1513                 mb();
1514                 writel(0, &regs->WinData);
1515                 mb();
1516         }
1517         writel(io, &regs->ExtIo);
1518         mb();
1519
1520         eptr = rr_read_eeprom_word(rrpriv,
1521                        offsetof(struct eeprom, rncd_info.AddrRunCodeSegs));
1522         eptr = ((eptr & 0x1fffff) >> 3);
1523
1524         p2len = rr_read_eeprom_word(rrpriv, 0x83*4);
1525         p2len = (p2len << 2);
1526         p2size = rr_read_eeprom_word(rrpriv, 0x84*4);
1527         p2size = ((p2size & 0x1fffff) >> 3);
1528
1529         if ((eptr < p2size) || (eptr > (p2size + p2len))){
1530                 printk("%s: eptr is invalid\n", dev->name);
1531                 goto out;
1532         }
1533
1534         revision = rr_read_eeprom_word(rrpriv,
1535                         offsetof(struct eeprom, manf.HeaderFmt));
1536
1537         if (revision != 1){
1538                 printk("%s: invalid firmware format (%i)\n",
1539                        dev->name, revision);
1540                 goto out;
1541         }
1542
1543         nr_seg = rr_read_eeprom_word(rrpriv, eptr);
1544         eptr +=4;
1545 #if (DEBUG > 1)
1546         printk("%s: nr_seg %i\n", dev->name, nr_seg);
1547 #endif
1548
1549         for (i = 0; i < nr_seg; i++){
1550                 sptr = rr_read_eeprom_word(rrpriv, eptr);
1551                 eptr += 4;
1552                 len = rr_read_eeprom_word(rrpriv, eptr);
1553                 eptr += 4;
1554                 segptr = rr_read_eeprom_word(rrpriv, eptr);
1555                 segptr = ((segptr & 0x1fffff) >> 3);
1556                 eptr += 4;
1557 #if (DEBUG > 1)
1558                 printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
1559                        dev->name, i, sptr, len, segptr);
1560 #endif
1561                 for (j = 0; j < len; j++){
1562                         tmp = rr_read_eeprom_word(rrpriv, segptr);
1563                         writel(sptr, &regs->WinBase);
1564                         mb();
1565                         writel(tmp, &regs->WinData);
1566                         mb();
1567                         segptr += 4;
1568                         sptr += 4;
1569                 }
1570         }
1571
1572 out:
1573         writel(localctrl, &regs->LocalCtrl);
1574         mb();
1575         return 0;
1576 }
1577
1578
1579 static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1580 {
1581         struct rr_private *rrpriv;
1582         unsigned char *image, *oldimage;
1583         unsigned long flags;
1584         unsigned int i;
1585         int error = -EOPNOTSUPP;
1586
1587         rrpriv = netdev_priv(dev);
1588
1589         switch(cmd){
1590         case SIOCRRGFW:
1591                 if (!capable(CAP_SYS_RAWIO)){
1592                         return -EPERM;
1593                 }
1594
1595                 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1596                 if (!image){
1597                         printk(KERN_ERR "%s: Unable to allocate memory "
1598                                "for EEPROM image\n", dev->name);
1599                         return -ENOMEM;
1600                 }
1601
1602
1603                 if (rrpriv->fw_running){
1604                         printk("%s: Firmware already running\n", dev->name);
1605                         error = -EPERM;
1606                         goto gf_out;
1607                 }
1608
1609                 spin_lock_irqsave(&rrpriv->lock, flags);
1610                 i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1611                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1612                 if (i != EEPROM_BYTES){
1613                         printk(KERN_ERR "%s: Error reading EEPROM\n",
1614                                dev->name);
1615                         error = -EFAULT;
1616                         goto gf_out;
1617                 }
1618                 error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
1619                 if (error)
1620                         error = -EFAULT;
1621         gf_out:
1622                 kfree(image);
1623                 return error;
1624
1625         case SIOCRRPFW:
1626                 if (!capable(CAP_SYS_RAWIO)){
1627                         return -EPERM;
1628                 }
1629
1630                 image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1631                 oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
1632                 if (!image || !oldimage) {
1633                         printk(KERN_ERR "%s: Unable to allocate memory "
1634                                "for EEPROM image\n", dev->name);
1635                         error = -ENOMEM;
1636                         goto wf_out;
1637                 }
1638
1639                 error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
1640                 if (error) {
1641                         error = -EFAULT;
1642                         goto wf_out;
1643                 }
1644
1645                 if (rrpriv->fw_running){
1646                         printk("%s: Firmware already running\n", dev->name);
1647                         error = -EPERM;
1648                         goto wf_out;
1649                 }
1650
1651                 printk("%s: Updating EEPROM firmware\n", dev->name);
1652
1653                 spin_lock_irqsave(&rrpriv->lock, flags);
1654                 error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
1655                 if (error)
1656                         printk(KERN_ERR "%s: Error writing EEPROM\n",
1657                                dev->name);
1658
1659                 i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
1660                 spin_unlock_irqrestore(&rrpriv->lock, flags);
1661
1662                 if (i != EEPROM_BYTES)
1663                         printk(KERN_ERR "%s: Error reading back EEPROM "
1664                                "image\n", dev->name);
1665
1666                 error = memcmp(image, oldimage, EEPROM_BYTES);
1667                 if (error){
1668                         printk(KERN_ERR "%s: Error verifying EEPROM image\n",
1669                                dev->name);
1670                         error = -EFAULT;
1671                 }
1672         wf_out:
1673                 kfree(oldimage);
1674                 kfree(image);
1675                 return error;
1676
1677         case SIOCRRID:
1678                 return put_user(0x52523032, (int __user *)rq->ifr_data);
1679         default:
1680                 return error;
1681         }
1682 }
1683
1684 static struct pci_device_id rr_pci_tbl[] = {
1685         { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
1686                 PCI_ANY_ID, PCI_ANY_ID, },
1687         { 0,}
1688 };
1689 MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
1690
1691 static struct pci_driver rr_driver = {
1692         .name           = "rrunner",
1693         .id_table       = rr_pci_tbl,
1694         .probe          = rr_init_one,
1695         .remove         = __devexit_p(rr_remove_one),
1696 };
1697
1698 static int __init rr_init_module(void)
1699 {
1700         return pci_register_driver(&rr_driver);
1701 }
1702
1703 static void __exit rr_cleanup_module(void)
1704 {
1705         pci_unregister_driver(&rr_driver);
1706 }
1707
1708 module_init(rr_init_module);
1709 module_exit(rr_cleanup_module);
1710
1711 /*
1712  * Local variables:
1713  * compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -pipe -fomit-frame-pointer -fno-strength-reduce -m486 -malign-loops=2 -malign-jumps=2 -malign-functions=2 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -c rrunner.c"
1714  * End:
1715  */